import axios from 'axios';
import { Notification, MessageBox, Message, Loading } from 'element-ui';
import store from '@/store';
import { getToken } from '@/utils/auth';
import errorCode from '@/utils/errorCode';
import { tansParams, blobValidate } from '@/utils/ruoyi';
import cache from '@/plugins/cache';
import { saveAs } from 'file-saver';

let downloadLoadingInstance;
// 是否显示重新登录
export let isRelogin = { show: false };

axios.defaults.headers['Content-Type'] = 'application/json;charset=utf-8';

// 创建 axios 实例
const service = axios.create({
  baseURL: process.env.VUE_APP_BASE_API,
  timeout: 10000,
});

// 请求拦截器
service.interceptors.request.use(config => {
  // 是否需要设置 token
  const isToken = (config.headers || {}).isToken === false;
  // 是否需要防止数据重复提交
  const isRepeatSubmit = (config.headers || {}).repeatSubmit === false;

  // 添加 token 到请求头
  if (getToken() && !isToken) {
    config.headers['Authorization'] = 'Bearer ' + getToken();
  }

  // GET 请求映射 params 参数
  if (config.method === 'get' && config.params) {
    let url = config.url + '?' + tansParams(config.params);
    url = url.slice(0, -1);
    config.params = {};
    config.url = url;
  }

  // 临时调试：将 PUT 请求转为 POST（仅针对特定接口），并添加 reason 参数
  if (config.method === 'put' && (config.url.includes('/dev-api/authuser/pass') || config.url.includes('/dev-api/authuser/unpass'))) {
    console.log(`[DEBUG] Converting PUT to POST for URL: ${config.url}`);
    config.method = 'post';
    // 如果接口要求 reason 参数，自动添加默认值（可根据实际需求调整）
    if (!config.data || !config.data.reason) {
      config.data = {
        ...config.data,
        reason: config.url.includes('pass') ? 'User passed authentication' : 'User failed authentication'
      };
    }
  }

  // 处理 POST 和 PUT 请求的重复提交校验
  if (!isRepeatSubmit && (config.method === 'post' || config.method === 'put')) {
    const requestObj = {
      url: config.url,
      data: typeof config.data === 'object' ? JSON.stringify(config.data) : config.data,
      time: new Date().getTime(),
    };
    const requestSize = Object.keys(JSON.stringify(requestObj)).length;
    const limitSize = 5 * 1024 * 1024;
    if (requestSize >= limitSize) {
      console.warn(`[${config.url}]: 请求数据大小超出允许的 5M 限制，无法进行防重复提交验证。`);
      return config;
    }

    const sessionObj = cache.session.getJSON('sessionObj');
    if (!sessionObj) {
      cache.session.setJSON('sessionObj', requestObj);
    } else {
      const s_url = sessionObj.url;
      const s_data = sessionObj.data;
      const s_time = sessionObj.time;
      const interval = 1000;
      if (s_data === requestObj.data && requestObj.time - s_time < interval && s_url === requestObj.url) {
        const message = '数据正在处理，请勿重复提交';
        console.warn(`[${s_url}]: ${message}`);
        return Promise.reject(new Error(message));
      } else {
        cache.session.setJSON('sessionObj', requestObj);
      }
    }
  }

  console.log(`[DEBUG] Request: ${config.method.toUpperCase()} ${config.url}`, config.data || config.params);
  return config;
}, error => {
  console.log('Request Error:', error);
  return Promise.reject(error);
});

// 响应拦截器
service.interceptors.response.use(res => {
  const code = res.data.code || 200;
  console.log("msg: "+res.data.msg);
  const msg = res.data.msg || errorCode[code] || errorCode['default'];
  if (res.request.responseType === 'blob' || res.request.responseType === 'arraybuffer') {
    return res.data;
  }

  if (code === 401) {
    // if (!isRelogin.show) {
    //   isRelogin.show = true;
    //   MessageBox.confirm('密码错误，请重新输入 ', '系统提示', {
    //     confirmButtonText: '重新登录',
    //     cancelButtonText: '取消',
    //     type: 'warning',
    //   }).then(() => {
    //     isRelogin.show = false;
    //     store.dispatch('LogOut').then(() => {
    //       location.href = '/index';
    //     });
    //   }).catch(() => {
    //     isRelogin.show = false;
    //   });
    // }
    return Promise.reject('无效的会话，或者会话已过期，请重新登录。');
  } else if (code === 500) {
    // if (!isRelogin.show) {
    //   isRelogin.show = true;
    //   MessageBox.confirm(msg, '系统提示', {
    //     confirmButtonText: '重新登录',
    //     cancelButtonText: '取消',
    //     type: 'warning',
    //   }).then(() => {
    //     isRelogin.show = false;
    //     store.dispatch('LogOut').then(() => {
    //       location.href = '/index';
    //     });
    //   }).catch(() => {
    //     isRelogin.show = false;
    //   });
    // }
    Message({ message: msg, type: 'error' });
    return Promise.reject(new Error(msg));
  } else if (code === 601) {
    Message({ message: msg, type: 'warning' });
    return Promise.reject('error');
  } else if (code !== 200) {
    Notification.error({ title: msg });
    return Promise.reject('error');
  } else {
    return res.data;
  }
},error => {
  console.log('Response Error:', error);
  let { message } = error;
  if (message === 'Network Error') {
    message = '后端接口连接异常';
  } else if (message.includes('timeout')) {
    message = '系统接口请求超时';
  } else if (message.includes('Request failed with status code')) {
    message = '系统接口' + message.substr(message.length - 3) + '异常';
  }
  Message({ message: message, type: 'error', duration: 5 * 1000 });
  return Promise.reject(error);
});

// 通用下载方法
export function download(url, params, filename, config) {
  downloadLoadingInstance = Loading.service({
    text: '正在下载数据，请稍候',
    spinner: 'el-icon-loading',
    background: 'rgba(0, 0, 0, 0.7)',
  });
  return service.post(url, params, {
    transformRequest: [(params) => tansParams(params)],
    headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
    responseType: 'blob',
    ...config,
  }).then(async (data) => {
    const isBlob = blobValidate(data);
    if (isBlob) {
      const blob = new Blob([data]);
      saveAs(blob, filename);
    } else {
      const resText = await data.text();
      const rspObj = JSON.parse(resText);
      const errMsg = errorCode[rspObj.code] || rspObj.msg || errorCode['default'];
      Message.error(errMsg);
    }
    downloadLoadingInstance.close();
  }).catch((r) => {
    console.error('Download Error:', r);
    Message.error('下载文件出现错误，请联系管理员！');
    downloadLoadingInstance.close();
  });
}

// 导出 PUT 方法支持
export function put(url, data, config = {}) {
  // 如果是特定的接口，确保 data 中包含 reason 参数
  if (url.includes('/dev-api/authuser/pass') || url.includes('/dev-api/authuser/unpass')) {
    data = {
      ...data,
      reason: data.reason || (url.includes('pass') ? 'User passed authentication' : 'User failed authentication')
    };
  }
  return service({
    url,
    method: 'put',
    data,
    ...config,
  });
}

export default service;
